Chore: Rename Id to ID in alerting models (#62777)

* Chore: Rename Id to ID in alerting models

* Add xorm tags for datasource

* Add xorm tag for uid

pkg/services/sqlstore/migrations/external_alertmanagers.go

@@ -55,14 +55,14 @@ func (e externalAlertmanagerToDatasources) Exec(sess *xorm.Session, mg *migrator
 				return err
 			}
 			ds := &datasources.DataSource{
-				OrgId:   result.OrgID,
+				OrgID:   result.OrgID,
 				Name:    fmt.Sprintf("alertmanager-%s", uid),
 				Type:    "alertmanager",
 				Access:  "proxy",
-				Url:     uri,
+				URL:     uri,
 				Created: time.Unix(result.CreatedAt, 0),
 				Updated: time.Unix(result.UpdatedAt, 0),
-				Uid:     uid,
+				UID:     uid,
 				Version: 1,
 				JsonData: simplejson.NewFromAny(map[string]interface{}{
 					"handleGrafanaManagedAlerts": true,